Dandy-roll for paper-making machines



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FRANK C. PLUME, OF THOMASTON, CONNECTICUT.

DANDY ROLL FOR PAPER-MAKING MACHINES.

SPECIFICATION forming part of Letters Patent No. 319,616, dated June 9, 1885.

Application filed April 30, [885.

To all whom it may concern:

Be it known that I, FRANK O. PLUME, of Thomaston, in the county of Litehfield and State of Connecticut, have invented a new and useful Improvement in DandyRolls for Paper-Making Machines, of which the following is a specification.

My invention relates to dandy-rolls for paper-making machines, in which the wire-cloth covering has a backing composed of perforated metal, as shown and described in United States Letters Patent No. 301,732, granted July 8, 1884, to David Lockwood. The perforated metal backing described in this patent is made by taking a sheet of finely-perforated metal, then bending it into cylindric form, and soldering or brazing the edges of the perforated sheet together to form a longitudinal seam. Such perforated metal backing for the cloth covering is very desirable; but it is very difficult to braze together the two edges of the perforated sheet, which is bent into cylindric form, and which is irregular by reason of the perforations in the sheet, and no means have yet been devised for accomplishing this result.

The object of my invention is to provide a dandy-roll with a perforated metal backing for the wirc-cloth covering, which will not be open to the objections in the method described in the above-reterred-to patent to Lockwood; and the invention consists in a'dandy-roll having a backing for the wire-cloth, consisting of a seamless perforated tube secured to the end pieces of the roll.

In the accompanying drawings, Figure 1 represents an exterior View of a seamless drawn tube of proper size to form the backing for a dandy roll. Fig. 2 represents an end view of such tube; and Fig. 3 represent the complete roll, a portion of the length being shown in exterior View and the remaining portion in longitudinal section.

Similar letters of reference designate corre sponding parts in the several figures.

A designates the perforated metal backing of a dandy-roll, which is riveted, brazed, or otherwise secured at its ends to the heads or flanges B, forming the end pieces of the roll.

(No model.)

The heads or flanges are secured upon a shaft, C, the ends of which project and form the journals of the roll.

In addition to the end pieces or heads B, I preferably provide at proper intervals in the length of the roll flanges or intermediate sup ports, D, which fit the interior of the perforated metal backing A, and to complete the roll this perforated metal backing has applied to it a covering of wire-cloth, E.

In making the metal backing I first take a seamless drawn tube, A,without seam orjoint, such as is shown in Figs. 1 and 2, and which is made of very thin metal, brass being preferred. This seamless drawn tube having no seam or joint is finally perforated throughout its entire extent, either by drilling or punching holes therein. This perforating by drilling or punching may be done before the tube has its ends secured upon the heads or end pieces, B, or after the tube is connected with the heads or end pieces, as may be desired.

By making the metal backing in the form of aseamless drawn tube I secure all the advantages which result from employing a perforated sheet-metal backing, as described in the referred-to patent to Lockwood, and I avoid all the dfficulties in making such back ing which result from bending a sheet of finely perforated metal into cylindric form, and attempting to braze or solder the irregular edge portions together.

In view of the patent to Lockwood, above referred to, I do not desire to claim, broadly, as of my invention a dandy-roll having a perforated metal backing for a wire-cloth covering; but

That I claim as my invention, and desire to-secnre by Letters Patent, is

In a dandy-roll for paper-making machines, a perforated metal backing consisting of a seamless drawn tube of metal, brazed or otherwise secured to the end pieces of the roll and perforated, substantially as herein described.

FRANK C. PLUME.

WVitnesses:

J. S. Ensrwoon, E. C. STOUGHTON. 

